Reland "Delete recycled video frame resources in background"

This is a reland of commit fbe817332f47fe76e2f1a31034fd926578b60432

Included required fix for nullptr checking of resource_updater_
(could be nullptr on context lost event).

Original change's description:
> Delete recycled video frame resources in background
>
> Allow to delete video frame resources from VideoFrameUpdater
> recycled pool in background (invisible page) to reduce
> shared image memory footprint.
>
> Bug: 381937282
> Change-Id: I31d7bb6d09978049014099e6071b82684c69177a
> Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/6074531
> Reviewed-by: Vasiliy Telezhnikov <vasilyt@chromium.org>
> Commit-Queue: Vasiliy Telezhnikov <vasilyt@chromium.org>
> Reviewed-by: Dale Curtis <dalecurtis@chromium.org>
> Cr-Commit-Position: refs/heads/main@{#1395458}

Bug: 381937282
Change-Id: Ifed2032a25c6b3e09d2c26c67f6fcec31e7450b4
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/6095721
Reviewed-by: Vasiliy Telezhnikov <vasilyt@chromium.org>
Commit-Queue: Vasiliy Telezhnikov <vasilyt@chromium.org>
Reviewed-by: Dale Curtis <dalecurtis@chromium.org>
Cr-Commit-Position: refs/heads/main@{#1407447}